GNSS Positioning

Status and Features
Nowadays, GNSS receivers have scores – and often hundreds – of channels, enabling them to track GPS, Glonass, Galileo and Compass signals simultaneously. The whole workflow from satellite tracking to calculating the coordinates of the position in a preferred reference system can be conducted automatically in real time. The price of GNSS receivers has dropped steadily since the first GPS receivers came onto the commercial market in 1982. In conjunction with the latest product survey results for GNSS receivers (available at www.geo‑, the author puts today’s GNSS status and features in perspective. (By Mathias Lemmens, senior editor, GIM International, The... (read more)
2012-12-18 01:53:20

Hemisphere GNSS Releases New GNSS RTK Engine

Hemisphere GNSS has announced the launch of Athena, its next-generation GNSS engine. According to the company, the new core engine has been designed to maximise the ability to excel at the rigorous GNSS requirements of multiple market segment customers in machine control, survey and GIS. Athena is developed for application in virtually every environment where high-accuracy GNSS receivers can be used. Hemisphere’s customers have tested and proven Athena’s performance in long baseline, in open-sky environments, under heavy canopy, and in geographic locations experiencing significant scintillation. The company claims the brand-new GNSS RTK engine has one of the most reliably consistent... (read more)
2015-05-08 11:09:16
2017-02-06 10:08:27

New Topcon GNSS Receiver

The new GR-5 GNSS receiver from Topcon Positioning Systems (TPS, USA) introduces its Fence Antenna technology and expanded channel support, providing high tracking sensitivity and multipath rejection in a compact and lightweight package. The device can perform any task for survey, engineering or construction, and its rugged I-beam design can withstand a two-metre (six-foot) drop onto concrete.   The new GR-5 receiver features also include a high-accuracy RTK engine with position updates up to 100Hz; integrated dual communication system with multiple radio and cellular combinations; IP66 dustproof and waterproof rating; MIL-STD shock and vibration tolerance and Bluetooth connectivity. It operates... (read more)
2011-03-21 10:50:17

GNSS Handheld Data Collector

Nexteq Navigation, Canada, has announced the T5A multifunctional GNSS handheld data collector. This device is a high-accuracy GPS unit capable of 2.0cm accuracy using Real Time Kinematics (RTK) and 50cm globally using Nexteq’s i-PPP technology. The T5A combines its centimetre-level precision with a versatility allowing for accurate data collection in various weather conditions. The T5A is equipped with a 3.7” colour touch screen that is with its IP66 rating both waterproof and dustproof and includes features such as Bluetooth, Wi-Fi, digital cellular data and voice, microSD card slots and a 3.0 megapixel digital camera. Like all Nexteq Navigation GPS handhelds,... (read more)
2012-06-05 12:00:00

French Surveyors’ GNSS

The French Order of Chartered Surveyors (Ordre des Géomètres Experts) has set itself the objective of completing a GNSS network over the national territory. This network will allow positioning in real time with a precision better than an inch (2.5cm) anywhere within France. About five hundred surveyors, one third of the profession, already support the network. The project will begin during the first quarter of 2005 and the network will be completely rolled out across the entire country by the end of 2005. It will benefit from the labelling of reference stations by the IGN for ensuring their integration into... (read more)
2005-03-16 12:00:00

GNSS Baseband Chip

OLinkStar offers OTrack32 GPS/BeiDou-2/GLONASS 32-channel baseband chip delivering hig performance using low power. The chip is capable of receiving multi-band GNSS signals simultaneously up to four groups and processing signals concurrently to make multiple constellation navigation possible within a single chip. The OTrack32 is designed in a host-based architecture. The chip supports position update rates of 1, 5, and 10Hz, up to 20Hz. The chip offers friendly interface with various processors including ARM, MIPS, DSP etc. (read more)
2010-11-04 10:34:12

Versatile GNSS Receiver

Altus Positioning Systems debuts its APS-U GNSS receiver at the Intergeo 2011 conference and trade fair show in Nuremberg, Germany. The APS-U provides multi-frequency capability together with GNSS heading, L-Band positioning and wireless communications, all within a rugged housing that meets military environmental specifications.     With its range of interfaces and 9-30V power input options, the APS-U is considered as a GNSS solution for machine control, agriculture, aerial photogrammetry, heading sensors and military applications.   The design is scalable from a single stand-alone GNSS receiver to full options with heading, wireless links and RTK capability. The unit has an... (read more)
2011-09-27 11:10:06

ProFlex 500 GNSS Receiver

Magellan Professional has launched the ProFlex 500 dual-frequency GNSS Receiver. The ProFlex 500 delivers RTK features in a rugged, highly integrated receiver design. The device is designed for multiple applications: surveying using a backpack, marine positioning, machine control, and base stations. Adaptable to a wide variety of applications requiring precise positioning, the ProFlex 500 is the ideal solution for people looking for a single GNSS receiver for multiple applications.   The heart of the ProFlex 500 is, a 75-channel GNSS board that tracks dual-frequency GPS and GLONASS signals as well as SBAS ranging signals, all of which are optimally processed... (read more)
2009-02-16 09:09:32

GNSS for Sea Trials

Measuring Ship Controllability
The effective seakeeping performance of any watercraft is vital for safe navigation. Due to the long maritime tradition in Greece, the National Technical University of Athens (NTUA) has been a key player in developing tools and practices for conducting sea trials in open water. Since the introduction of the Mini-Ranger many years ago through to the recent introduction of the modern GNSS sensors, a number of new-built and commissioned surface ships of various sizes have been tested either in the interests of the shipbuilder or the owner. Currently, new navigation tools and techniques are being set in place to fulfil... (read more)
2013-02-25 02:32:53
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